Android 通过文本添加斜线
我正在开发一个数学应用程序,我需要用斜线划出文本,如果我使用横线划出文本,我就不能使用draw-Abable,因为我已经在使用它作为文本视图背景 我甚至试着在有边框的可绘制文件中创建一条对角线,但运气不佳,我做不到。有没有办法做到这一点? 我正在附加文本视图背景文件Android 通过文本添加斜线,android,layout,textview,Android,Layout,Textview,我正在开发一个数学应用程序,我需要用斜线划出文本,如果我使用横线划出文本,我就不能使用draw-Abable,因为我已经在使用它作为文本视图背景 我甚至试着在有边框的可绘制文件中创建一条对角线,但运气不佳,我做不到。有没有办法做到这一点? 我正在附加文本视图背景文件 <?xml version="1.0" encoding="utf-8" ?> <shape xmlns:android="http://schemas.android.com/apk/res/andr
<?xml version="1.0" encoding="utf-8" ?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:thickness="0dp"
android:shape="rectangle">
<stroke android:width="3dp"
android:color="#4799E8"/>
<corners android:radius="5dp" />
<gradient
android:startColor="#ffffff"
android:endColor="#FFFFFF"
android:type="linear"
android:angle="270"/>
</shape>
您必须创建自定义的TextView来实现这一点
这将帮助您创建它
public class ObliqueStrikeTextView extends TextView
{
private int dividerColor;
private Paint paint;
public ObliqueStrikeTextView(Context context)
{
super(context);
init(context);
}
public ObliqueStrikeTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
init(context);
}
public ObliqueStrikeTextView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init(context);
}
private void init(Context context)
{
Resources resources = context.getResources();
//replace with your color
dividerColor = resources.getColor(R.color.black);
paint = new Paint();
paint.setColor(dividerColor);
//replace with your desired width
paint.setStrokeWidth(resources.getDimension(R.dimen.vertical_divider_width));
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
canvas.drawLine(0, getHeight(), getWidth(), 0, paint);
}
}
通过使用包完全限定视图,可以在布局文件中使用它,如下所示:
<your.package.name.ObliqueStrikeTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1234567890"
android:textSize="20sp"/>
我只想在@Nakul的答案中添加一个小小的修改,即不需要为穿透的长度定义静态维度,您可以得到textview本身的宽度
public class ObliqueStrikeTextView extends TextView
{
private int dividerColor;
private Paint paint;
public ObliqueStrikeTextView(Context context)
{
super(context);
init(context);
}
public ObliqueStrikeTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
init(context);
}
public ObliqueStrikeTextView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init(context);
}
private void init(Context context)
{
Resources resources = context.getResources();
//replace with your color
dividerColor = resources.getColor(R.color.black);
paint = new Paint();
paint.setColor(dividerColor);
//replace with your desired width
/*Modification*/
//Instead of providing static width you can pass the width of textview itself like this
paint.setStrokeWidth(this.getWidth());
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
canvas.drawLine(0, getHeight(), getWidth(), 0, paint);
}
}
在科特林
public class ObliqueStrikeTextView : TextView {
private var dividerColor: Int = 0
private lateinit var paint: Paint
constructor(context: Context) : super(context) {
init(context)
}
constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
init(context)
}
constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle) {
init(context)
}
private fun init(context: Context) {
val resources = context.resources
//replace with your color
dividerColor = resources.getColor(R.color.black)
paint = Paint()
paint.apply {
color = dividerColor
//replace with your desired width
strokeWidth = resources.getDimension(width)
}
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
if(::paint.isInitialized){
canvas.drawLine(0.0f, height.toFloat(), width.toFloat(), 0.0f, paint)
}
}
}
这是上面@sunil答案的精简版本。 此外,我还更改了删除线的角度,使其在文本视图上看起来更好
class ObliqueStrikeTextView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyle: Int = 0)
: TextView(context, attrs, defStyle) {
private var dividerColor: Int = 0
private var paint: Paint
init {
dividerColor = ContextCompat.getColor(context, R.color.redCarnation)
paint = Paint().apply {
color = dividerColor
strokeWidth = resources.getDimension(R.dimen.strikethrough_line_width)
}
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
//reduce angle by 20%
val startY = height * 0.8f
val stopY = height - startY
canvas.drawLine(0.0f, startY, width.toFloat(), stopY, paint)
}
}
谢谢nakul,但是我需要在单击按钮时敲打文本,所以我如何通过编程调用obliqueStrike文本视图。点击之前,文本应该是正常的。请帮我解决问题。一个简单的选项是:点击按钮,隐藏/显示正常和删除文本视图。hello nakul,我正在尝试AbliqueStrike文本视图,但不幸的是,我无法显示它,我显示了我的部分代码..你能找出错误吗?你能给出你的邮件id吗?你可以随时用相关代码问一个新问题…:你不需要我来帮你: